APM 2.8 ARM problem

@Dejan_Ranisavljevic wrote:

Regards to all,

I need help around the APM 2.8 + Power module.

I installed the multicopter and connected everything in the house and ready to go flying.
However, I could not arm him on the fly today.

By coming home I check all the connectors OK, I connect to the PC and open the Mision planner and how much I see everything OK.

I plug the battery while it's still attached to the PC and I try Arm whenever it does it all right.
Straight out into the yard to try, when it will not Arm again.

So I scrambled a bit and came to the conclusion:
1 - As long as an APM is connected to a PC via a USB port, Arm can accept the commands.
2 - When you turn off the USB from the APM switches to RTL and I can only use the ruder and for a few seconds then the engines stand.
3 - Power module is attached to APM and skip jumper JP1
4 - I do not know what the problem is and I ask for more help.

Thanks in advance.

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